Oxygen permeability of contact lenses the secret of eye breathing

Oxygen permeability of contact lenses the secret of eye breathing


Once you put on contact lenses, happiness becomes so simple that no one can resist the charm of contact lenses. However, eyes also need to breathe. Oxygen permeability of contact lenses is the key to corneal breathing and eye health.
Why do eyes need to breathe? The surface of the eyeball h as no blood vessels, and it relies heavily on tears to absorb and transport oxygen from the air to support cellular functions. If the cornea does not receive enough oxygen, it can malfunction at any moment. If this lack of oxygen persists and worsens, dryness, redness, and a foreign body sensation will follow. In more severe cases, it may lead to inflammation or the growth of new blood vessels, ultimately affecting vision.
The oxygen permeability of contact lenses directly affects whether the cornea can breathe freely. To ensure the cornea can breathe freely, the lenses must not obstruct this process. The higher the oxygen permeability coefficient of contact lenses, the better their oxygen permeability, which means more oxygen can reach the eyeball through the lenses. Currently, daily disposable lenses generally have a higher water content and a higher DK value, making them a high-quality choice. If the lenses are made of silicone hydrogel, they are even better, as they can continuously supply sufficient oxygen to the eyes even with prolonged wear. Therefore, choosing the right lens is like giving your eyes an extra layer of protection.
However, many people, for convenience, wear their contact lenses all day long and don't want to take them off even at night. This leads to increasingly dry eyes and blurred vision. When the moisture in contact lenses evaporates, they absorb tears excessively, leading to a severe lack of moisture in the eye. Over time, this can weaken the eye's resistance, allowing bacteria to invade, and inflammation can quickly follow. In summary, proper care is essential on a daily basis. It's important to strictly adhere to the recommended wearing duration and never leave your lenses overnight. Expired lenses should be discarded immediately; otherwise, even the best and most expensive contact lenses will only cause more harm. Additionally, it's important to give your eyes a break to ensure they are not overworked when you need them.
 

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